Highlights
- Bedrock mapping in the Walmsley Lake area has established a framework for understanding the relative timing of stratigraphic, structural, magmatic and metamorphic events in the area, and for geological correlations with other parts of the Slave Province.
- Magnetotelluric data demarcate the southern and eastern limits of a mantle conductivity anomaly relative to crustal structures and diamond-bearing kimberlites.
- Teleseismic data have imaged the Moho at 37-42 km depth, and a low velocity layer in the lithospheric mantle between 90/100 km and 140-150 km depth. This layer coincides with the MT anomaly, interpreted as an ultra-depleted harzburgitic layer based on petrologic data (Griffin et al., 1999).
- Isotopic studies of granites delimit the eastern extent of Mesoarchean basement in the subsurface.
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